Improvement in steam-boiler furnaces



E. KASELOWSKY.

Steam-Boiler Furnace.

Patented Oct. 5, 1875.

NPETERS. PHOTO-LITHDGRAFHER, WASHINGTON. D C.

'UNrrED STATES ATENT OFFICE.

EMIL KASELOWSKY, BERLIN, PRUSSIA.

'IMPROVEMENT IN ST-EAM-BOILER FURNACES.

Specification forming part of Letters Patent No. 168,502, dated October 5, 1875; application filed Jury 15, 1875.

This invention relates to the construction of steam-boilers with internal tire-box; and the object of the same is to avoid all staybolts, so as to facilitate the cleaning of the boiler from scale and sediment, to make the same safer against accidents, and to afford other advantages, whichr will be enumerated hereafter. l

This boiler is represented on the annexed sheet of drawings, Figure 1 being a longitudinal vertical section, and Fig. 2 a crosssection through the tire-box, of one modilication, while Figs. 3 and 4 show the corresponding views of a second modification.

The interior lire-box is made cylindrical, as also the shell of the same, but both are arranged eccentrically to each other. They are cut'out at the bottom, and the edges of `the plate around the openings of both parts are united by riveting, having a ring or distance piece, e, placed between them, as will be seen from the drawings. The internal fire-box, however, is not fixed to the shell of the same by any stay-bolts whatever. These are not required on account of the cylindrical shape of both.

For the purpose, however, of completely stiffening the interior lire-box, the same may be made of corrugated plates, as in Figs. 1 and 2; or, in case common plates be preferred, they may be strengthened by rings of T- iron, as in Figs. 3 and 4, or in any similar manner.

The shell b of the tube part of the boiler is made cylindrical, as usual, and it is, by preference, placed eccentrically to the shell ot' the fire-box, the tops of both being nearly in a line. The difierences of the pressures of steam on the inner and the outer tire-box hav- Y ing a tendency to bend outward, or to stretch The opening at the bottom of the re-box serves for the free admission ot' the air i'roin below to the grate,1and the latter can be arranged as low inthe lire-box as may be desired without hindering the draft, as is ever the case with cylindrical lire-boxes closed at the bot-tom.

A tire-bridge, K. of any convenient design or material, may be introduced without obstacle. For example, the saine can be constructed of tubes, through which the water of the boiler` circulates.

In this boiler no ilat surfaces ot' plate are exposed to the steam pressure, with the sole exception of the tube-plate and a part of the front plate. The former is, however, sufciently stayed by the tubes, and the lat-ter being well rounded at the corners, as also the front of the .interior lire-box, only a small part of the outer front plate remains iiat, and this may be Vsecured in the usual manner by two angle-irons, f, and the stays g, the outer ends ot which may be attached to brackets riveted to the tube part of the shell; but this front plate may even be made spherical, so as to avoid flatparts of the same altogether'.

The advantages of this boiler are the following: First, the cleaning and the examination ot' the same are much facilitated, especially as cleaning-orifices may easily be arranged at any desired point. There are no inaccessible spaces where an accumulation of scale can take place, so as to cause a burning through of the hre-box. Second, the lire-box nowhere presents a resistance against expansion from heat, as is caused by stay-bolts. The cracks otherwise appearing in the corners of the iire-boxes, therefore, cannot occur. Third, the execu'tionis considerably cheaper. Fourth, the admission of air to the grate is not restricted, as in other cylindrical tire-boxes. Fifth, in case a rire-box is to be replaced by a new one, this presents less difiiculty, and can be done at a smaller expense in a shorter time.

I claim as my invention- The combination of the cylindrical boilershell having an opening at the bottom, the cylindrical fire-box open at the bottom, ar.

ranged eccentrica-ily within the boiler-shell,

, and connected at its lower edges to the edges of the shell, and the grate situated Within the coinciding openings of the shell and rebox, substantially as and for the purpose set forth.

In testimony whereof lhave signed my name to this speoieation in the presence of two subscribing witnesses.

EMIL KASELOWSKY. Witnesses L. SGHWARTZKOPFT, C. J ERAU. 

